Question # 1

Which of the following in the best container for gas during adiabatic process.

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Copper vessel

Thermos flask

Glass container

Wooden container

The magnetic flux linked with a circuit when a unit current flows through it is known as.

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Induced current

Induced emf

Coefficient of self induction of circuit

Eddy current

The decimal equivalent of 1111 is

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5

10

15

120

A device which converts electrical energy into mechanical energy is called.

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A.C generator

D.C. generator

Motor

Commutator

When a liquid is hated retaining its liquid sate then its molecules gain.

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K.E.

P.E

Heat energy

Chemical energy

Which of the following is not necessary for work to be done.

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A constant force

An applied force

A displacement

Force component along the displacement

When amplitude of a wave becomes double its energy becomes.

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Xero

Double

4 times

6 times

The power of convex lens of focal length 50 cm will be

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1,0 dioptre

2.0 dioptre

4.0 dioptre

5.0 dioptre

The dimensions of strain are.

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[MLT-2]

[ML-1T-2]

[ML-2T-3]

It is a dimensionless quantity

The SI unit of stress is

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kg m s-2

kg m-1 s-2

N m-2

N m-1

During an adiabatic gas expansion the environment

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Serves as a heat sink

Serves as a heat source

Must be at a higher temperature than the gas

Does not have to participate

The chain reaction is controlled by a series of rods usually made of.

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uranium

Cadimium

Boron

Steel

Since selenium becomes conductor in light so it is.

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Photoconductor

Photocell

Thermistor

Photodiode

Who developed the first atomic reactor.

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Bohr

Fermi

Rutherford

Taylor

A converging mirror with a radius of 20 cm creates a real image 30 cm from the mirror What is the object distance.

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-5.0 cm

-7.5 cm

-15 cm

-20 cm

A LASER beam may be used to measure very large distance because it is.

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Unidirectional

Coherent

Monochromatic

Massive

Which of the following has negative specific heat

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Ne

CO2

O2

Sturated vapours

At which temperature a ferromagnetic material becomes paramagnetic on healing.

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Kelvin temperature

Celsius temperature

Curie temperature

Fahrenheit temperature

Diffraction is a special type of.

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Polarization

Interference

Dispersion

Scattering

The combined effect of resistance and reactance's in A.C. circuit is called.

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Resistance

Conductance

Choke

Impedance

Difference between the molar heat capacity constant pressure and that a constant volume is equal to

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Root mean square velocity

Mean free path

Boltzmann's constant

Universal gas constant

If a wave vibrate 10 times in 1 s with a speed of 10 m s-1 the correct wavelength of the wave is.

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1 m

10 m

20 m

100 m

The electromagnetic waves propagated outing space from antenna of a transmitter are known as.

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Infrared waves

Light waves

Radio waves

X-rays

Which of the following configuration of BJTs gives both voltage gain and current gain.

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common Base

Common Emtter

Common collector

All of the above

When did an international committee agree on a set of definition of units.

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1912

1956

1960

1986

The expression PV/KT represents.

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Number of moles of the gas

Number of molecules in the gas

Total mass of the gas

Density of the gas

If 'p' is the momentum of an object of mass 'm' the expression p2/m has base units identical to.

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Power

Force

Velocity

Energy

Which statement is true about the Magnetic poles.

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Unlike poles repel

Like poles attract

Magnetic poles do not effect each other

A single magnetic pole does not exist

If the temperature of the source and sink are increased by same amount the efficiency of the engine.

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Increases

Decreases

Remains unchanged

May increases of decrease

During solid ficain the temperature.

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Remains constant at the freezing point

Increases at the freezing point

Decreases at the freezing point

Decreases at the melting point

The locus of all points in a medium having the same phase of vibration is called.

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Creast

trough

Wavelength

Wave front

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